Add support for the steep LSP

[wouterken]

This PR aims to add support for the soutaro/steep LSP.
Because by default the steep check command will type-check an entire project (which can be quite expensive on a large repository), the configuration defaults to only enabling the LSP if a root-level Steepfile exists (at which point it's clear you've opted into gradual typechecking with Steep).

You can disable this with lsp: setting:

{
  "steep": {
    "settings": {
      "require_root_steepfile": false
    }
}

Note sure if that's reasonable default behavior..

[vitallium]

Thanks for adding steep! I think before we land this we need to disable steep explicitly in default Zed settings here.

@notpeter Hi, sorry for the direct ping but do you know if it's possible to avoid modifying the default.json file to tweak the LS servers for a language?

[notpeter]

@notpeter Hi, sorry for the direct ping but do you know if it's possible to avoid modifying the default.json file to tweak the LS servers for a language?

Sadly, I think that is what's currently required until there is a better story for:

• Multiple language servers on one language zed-industries/zed#24100.

Tag me in a PR with that and I'll merge and sneak it into stable/preview so we don't have to wait two weeks to merge this PR.

[vitallium]

Looks awesome! I fixed one small linter offence to land this PR. Thank you!

[vitallium]

@notpeter Hi, sorry for the direct ping but do you know if it's possible to avoid modifying the default.json file to tweak the LS servers for a language?

Sadly, I think that is what's currently required until there is a better story for:

• Multiple language servers on one language zed-industries/zed#24100.

Tag me in a PR with that and I'll merge and sneak it into stable/preview so we don't have to wait two weeks to merge this PR.

@notpeter hi! Here is the PR that adds steep and sorbet for the Ruby language.